/* 全局样式 */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
  }
  
  /* 顶部栏样式 */
  .top-bar {
    background-color: #f5f5f5;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
  }
  
  /* 横幅样式 */
  .banner {
    position: relative;
    text-align: center;
  }
  
  .banner img {
    width: 100%;
    height: auto;
  }
  
  .banner h1 {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #000;
  }
  
  /* 促销区样式 */
  .promotion {
    display: flex;
    justify-content: space-between;
    margin: 20px;
  }
  
  .promo-box {
    flex: 1;
    margin: 0 10px;
    text-align: center;
  }
  
  .promo-box img {
    width: 100%;
    height: auto;
  }
  
  .product-box {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
  }
  
  .product {
    flex: 0 0 30%;
    margin: 10px;
    text-align: center;
  }
  
  .product img {
    width: 100%;
    height: auto;
  }
  
  .price {
    color: red;
    font-weight: bold;
  }
  
  /* 新品区样式 */
  .new-arrivals {
    margin: 20px;
  }
  
  .new-arrivals h2 {
    text-align: left;
  }
  
  /* 页脚样式 */
  .footer-links {
    display: flex;
    justify-content: space-around;
    background-color: #f5f5f5;
    padding: 10px;
  }